Help with Microphone Chips specifications:

Measurement microphones are designed to detect sound, noise levels, and other characteristics, or for quantification and analysis. They are not necessarily meant for sound signal transmission to speakers.

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Measure of how responsive or "hot" a microphone is. Sensitivity may be given in millivolt output per Pascal of sound pressure, or may be specified in dBV (dB), in which case it is typically a negative number. A correctly specified signal should exceed the inherent noise of the system yet not overload the preamplifier.

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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Piezoelectric Devices make use of the Piezoelectric Effect to perform an electronic or mechanical. The piezoelectric effect is found on some crystals, which acquire a charge when compressed, twisted or distorted. This provides a convenient transducer effect between electrical and mechanical oscillations. Several types of devices are available: actuators, sensors, motors, transducers, etc.

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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
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Frequency response is the range of frequencies for which the microphone maintains a constant sensitivity within defined boundaries. Variation from this "linear" or "flat" sensitivity is given in dB; bounds that the define the linear frequency response will be in the form of ±3dB, -1dB/+4dB, etc.

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User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.

Unidirectional microphone with an effective sensitivity angle of approximately 130°, or fairly well focused. Best rejection is directly opposite the direction of maximum sensitivity. So named because of the resemblance of the directivity graph to a traditional depiction of the human heart.

All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Restriction of Hazardous Substances (RoHS) is a European Union (EU) directive that requires all manufacturers of electronic and electrical equipment sold in Europe to demonstrate that their products contain only minimal levels of the following hazardous substances: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl, and polybrominated diphenyl ether. RoHS became effective on July 1, 2006.

Sound intensity is measured by an instrument with closely matched microphone pairs.

Search Logic:

All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.